土坝渗漏按部位分为_______、_______、_______和_______四种
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导渗的目的是降低浸润线,减少渗压水头,增加坝体与坝基的渗流稳定性。
A. 对
B. 错
Part 1: para ____---para ______Main ideas:
Part 2: para ___---_____Main ideas: ______________________________________________________________________________________________
Part 3: para____---_______Main ideas: ________________________________________________________________________________________________